Patent GB-999303-A (GB)
Title: Method and apparatus for metering stacking and packaging articles
IPC: B65B23/12
Filed: 1961-10-30
Abstract: 999,303. Packaging; conveyers. NATIONAL BISCUIT CO. Oct. 30, 1961 [Nov. 14, 1960], No. 38705/61. Headings B8A and B8C. In a feeding and packaging machine, articles 11 in columns 10, Fig. 1A, are fed by a conveyer 118 to an inclined plate 13 and into abutment with a plate 17 which has pairs of slots through which extend the ends 16 of U-shaped flights 15 connected by pins 128, 128<SP>1</SP>, Fig. 5, in staggered relationship between two chains 102, the articles being picked up one at a time by flights 15 to form a plurality of staggered rows, the articles lying flat on plate 17. A stop 134, Fig. 2A, prevents more than one article being picked up. Conveyer 118 comprises a wire-mesh coated with polyethylene. Carriers 147, Fig. 2B, on chains 20 have elements 21 which pass between the ends 16 of flights 15 and continue the movement of the staggered articles when flights 15 pass beneath plate 17. Keeper plates on guides between the columns of articles prevent them rising from plate 17, Fig. 7, not shown. The articles are then fed by elements 21 to a continuously rotating wheel 23 comprising spaced, staggered pockets 22 which are approximately horizontal when they pass plate 17. A series of plungers 156, Fig. 1A, mounted by shafts 159, 160, rotate with the wheel 23 and are moved across the pockets by a cam acting on follower 165, to move the articles to overlap each other, Fig. 11 (not shown), and lie in batches of five, for example, over a groove 168 into which extends a finger 169 of a plate 25, Figs. 1A, 2B, 2C. Fingers 27 carried by two chains 56 also pass into groove 168 behind the batches of article as the finger 169 moves the last article of a batch from wheel 23, to move the batches on to a conveyer 29 where the jaws of grippers 32a, 32b take over. The sprockets 57, 58 of chains 56, Fig. 2C, are carried on a lever 59 which is rocked about 60 by a cam mechanism 28 so that each finger 27 is rapidly moved from a horizontal position to a vertical position without advancing longitudinally of wheel 23 to avoid contact with the next batch of articles. The fingers 27 are spaced to combine a desired number of batches in a column A which is gripped at the front and rear side faces by grippers 32a, 32b which have arms spring- urged together and pivotally carried by blocks on a conveyer 33, the arms being moved apart by cams, Figs. 17-19 (not shown). Front and rear end grippers 34a, 34b are carried by blocks on a chain 80 and are mounted on the blocks by a parallel motion linkage which is actuated by a cam, Fig. 20 (not shown), to engage the grippers with column A to move it from conveyer 29 as side grippers 32a, 32b are withdrawn and on to a plate 36 of apacking machine. A wrap is fed over a creasing roller 232, Fig. 23, and passes beneath former plate 233 and back plate 234 and between plates 36, 37. The column A is moved into this U-shaped wrap by grippers 34a, 34b and the wrap and articles are moved by a conveyer 238 to a conventional wrapping machine as the grippers are withdrawn by cams 236. The conveyer and operating cams are driven from an input shaft 40, Fig. 2C, via various gears.